Method for the manufacture of PuO.sub.2 -containing crystals

Details Method for the manufacture of PuO.sub.2 -containing crystals Method for the manufacture of PuO.sub.2 -containing crystals

1983-11-30

1986-01-21

Miller, Edward A.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Radioactive metal

423251, C01G 5600

Patent

active

045656720

ABSTRACT:
A method for manufacturing Pu.sub.2 -containing crystals by oxidizing plutonium in a heavily contaminated nitric acid starting solution to Pu.sup.6+, precipitating ammonium plutonyl carbonate containing crystals by reaction with ammonium- and carbonate ions and subsequent separating and calcining of these crystals. The nitric acid solution with the oxidized Pu.sup.6+ as well as carbonate and/or acetate ions and NH.sub.3 are dosed into an aqueous starting solution of ammonium carbonate or ammonium acetate in a concentration such that the mol ratio of carbonate and/or acetate ions to the Pu.sup.6+ -ions in the solution is at least 4:1 and plutonium containing carbonato- or acetato complex compounds which remain dissolved in the receiver solution, are formed, while difficult-to-dissolve metal hydroxide compounds are precipitated. Thereupon NH.sub.3 and carbonate ions are added to precipitate the ammonium plutonyl carbonate containing crystals.

REFERENCES:
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patent: 2867640 (1959-01-01), Gotman
patent: 2871251 (1959-01-01), Gotman et al.
patent: 2892678 (1959-06-01), Thompson et al.
patent: 2894812 (1959-07-01), Duffield
patent: 3372999 (1968-03-01), Stevenson
patent: 3790658 (1974-02-01), Fox et al.
patent: 4235740 (1980-11-01), Druckenbrodt et al.
Russell, J. Inorg. Nucl. Chem., 36 (#7), 1659-1660, (Jul. 1974).

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